Sensor-equipped rolling bearing apparatus

Abstract

A sensor-equipped rolling bearing apparatus includes a hub spindle, an outer ring concentrically disposed around an outer periphery of the hub spindle, first and second inner rings fitted on the hub spindle to rotate together with the hub spindle, with ends of their smaller rib portions opposed to each other, two rows of tapered rollers disposed respectively between the outer ring and the first inner ring and between the outer ring and the second inner ring, and a sensor for detecting a rotating state of the hub spindle 11 . A cylindrical portion is formed integrally at an end of the smaller rib portion of the first inner ring, and extends toward the end of the smaller rib portion of the second inner ring in an axial direction. A detection portion for enabling the sensor to detect the rotating state is formed on an outer peripheral surface of the cylindrical portion.

1 . A sensor-equipped rolling bearing apparatus comprising:
 a hub spindle including a flange formed at a one end portion thereof, a wheel being adapted to be mounted on the flange;   an outer ring concentrically disposed around an outer periphery of the hub spindle;   first and second inner rings which are fitted on the hub spindle so as to rotate together with the hub spindle, and includes smaller-diameter end portions opposed to each other, respectively;   a plurality of rolling elements disposed between the outer ring and the first and second inner ring;   a sensor which that detects a rotating state of the hub spindle; and   a cylindrical portion that is formed integrally at one of the smaller-diameter end portions of the first and second inner rings, and extends toward the other smaller-diameter end portion in an axial direction thereof,   wherein the cylindrical portion includes a detection portion that is integrally formed on an outer peripheral surface thereof and opposed to the sensor for enabling the sensor to detect the rotating state.   
   
   
       2 . The sensor-equipped rolling bearing apparatus according to  claim 1 , wherein an outer diameter of the cylindrical portion is smaller than an outer diameter of the smaller-diameter end portion at which the cylindrical portion is formed. 
   
   
       3 . The sensor-equipped rolling bearing apparatus according to  claim 1 , wherein the cylindrical portion includes a slanting surface formed on an end portion of the outer peripheral surface thereof so as to slant to decrease in diameter gradually toward an end surface of the cylindrical portion.